Browsing by Author "Lambe, Robert C."
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- 1976 Virginia plant disease control guideCouch, Houston B.; Drake, Charles R.; Hickey, K. D.; Lambe, Robert C.; Osborne, W. Wyatt; Pristou, Robert; Skelly, John M.; Stipes, R. Jay; Baldwin, Robert E. (Virginia Cooperative Extension Service, 1976-01)Guide is intended to serve as a ready reference to disease control measures for extension agents, growers, custom spray applicators, processors, chemical company representatives, and dealers in Virginia
- An analysis of the potential effects of air pollutants emitted during coal combustion on yellow poplar and loblolly pine and influences on mycorrhizal associations of loblolly pineMahoney, Matthew J. (Virginia Polytechnic Institute and State University, 1982)Yellow poplar (Liriodendron tulipifera L.) and loblolly pine (Pinus taeda L.), families 2-8 and 540, seedlings were fumigated with 0.07 ppm ozone, 0.06 ppm sulfur dioxide 0.07 ppm ozone + 0.06 ppm sulfur dioxide, 0.06 ppm sulfur dioxide + 0.10 ppm nitrogen dioxide and 0.07 ppm ozone + 0.06 ppm sulfur dioxide + 0.10 ppm nitrogen dioxide for 35 consecutive days, 6 hr/day. Control seedlings received charcoal-filtered air. Ozone or sulfur dioxide did not significantly affect height growth or dry weight of yellow poplar seedlings. All other treatments significantly reduced height growth and dry weight after 2 weeks of fumigation. Height growth effects of loblolly pine families were not repeatable from one year to the next in replicate experiments and weekly growth trends in the two experiments were reversed. Environmental factors related to time of year were thought to be involved with this growth trend reversal. Root dry weight was found to be a more sensitive indicator of air pollution stress than either shoot dry weight, height growth or visible symptoms. Loblolly families 2-8 and 540 were not found to be differentially sensitive to pollutant treatments. Loblolly pine seedlings, nonmycorrhizal and mycorrhizal with Pisolithus tinctorius, were fumigated with 0.07 ppm ozone and 0.06 ppm sulfur dioxide singly and in combination, 6 hr/day, for 35 consecutive days. Height growth of mycorrhizal and nonmycorrhizal seedlings was not affected by fumigation. Root dry weight of nonmycorrhizal seedlings was significantly reduced by all pollutant treatments in two replicate experiments. A similar reduction in root dry weight of mycorrhizal seedlings did not occur. Shoot dry weight of nonmycorrhizal seedlings was reduced in four of six pollutant treatments, and in one of six treatments of mycorrhizal seedlings. Mycorrhizal formation was extensive regardless of treatment. Apparent photosynthesis, measured every 4 days, was variable and significant differences among treatments did not occur. Total reducing sugar concentrations of roots were an inconclusive indicator of air pollutant stress.
- Bacterial black rot of cabbageLambe, Robert C.; Baldwin, Robert E.; Tabor, T. E. (Virginia Cooperative Extension Service, 1979-01)Bacterial black rot of cabbage including disease cycle, symptoms, survival and spread of the bacteria, and disease prevention and control
- Black root rot of Japanese hollyLambe, Robert C.; Ridings, W. H. (Virginia Cooperative Extension Service, 1980-03)Black root rot on Japanese Holly in Virginia
- Chemicals for the control of diseases of floral cropsLambe, Robert C.; Lindstrom, Richard S. (Virginia Cooperative Extension Service, 1980-12)The conditions under which many floral and foliage crops are produced, i.e., high humidity, low light intensity and frequent watering are favorable for the development 0£ fungal and bacterial diseases. If insects are uncontrolled in the greenhouse, viruses can become a major problem. Nematodes may be introduced on infected plant material or unsterilized soil. Sanitation in propagation and growing will reduce the incidence of disease. Soil-less culture, healthy plant material, clean containers and benches, and pathogen-free water are important. considerations. Plant culture on wire benches will avoid soil-borne pathogens. Most fungicides are protectants and require frequent re-application. Early correct identification of causal agents is important in preventing heavy disease losses and avoiding improper use oi pesticides.
- Club-root of cabbageLambe, Robert C.; McCart, Gerald D.; O'Dell, Charles R. (Virginia Cooperative Extension Service, 1979-01)Club root of cabbage disease cycle, symptoms, spread and survival of fungus. Control and fungicides
- Control of diseases of flowers, ground cover plants and woody ornamentals in the home yardLambe, Robert C.; Baldwin, Robert E. (Virginia Cooperative Extension Service, 1976-01)List of plants, diseases, and fungicide and formulation, its active ingredient, and rate per gallon
- Disease resistant home vegetablesLambe, Robert C.; Tolin, Sue A.; Baldwin, Robert E. (Virginia Cooperative Extension Service, 1980-03)List of specific vegetables to grow in Virginia with their various ratings for disease resistance from very susceptible to highly resistant
- Disease resistant vegetable cultivars for home and marketLambe, Robert C.; Tolin, Sue A.; Baldwin, Robert E. (Virginia Polytechnic Institute and State University. Extension Division, 1987-06)Contains a list of vegetables and their susceptibility to common diseases.
- Diseases of euonymousLambe, Robert C.; McRitchie, J. J. (Virginia Cooperative Extension Service, 1980-08)Diseases of euonymous including anthracnose, crown gall, and powdery mildew
- Early blight of tomatoesLambe, Robert C.; Pristou, Robert (Virginia Cooperative Extension Service, 1978-06)Early blight of tomatoes, caused by Alternaria solani is one of the most common disease in tomatoes. Damage, disease process and control
- Entomosporium leaf spot of photiniaLambe, Robert C.; Ridings, W. H. (Virginia Cooperative Extension Service, 1980-03)entomosporium
- General Diagnostic GuideLambe, Robert C.; Adler, Barry, 1952- (Virginia Cooperative Extension Service, 1981-01)Lists common symptoms seen in food-production plants, the possible causes, and the possible cures.
- Guide for the chemical control of woody ornamental and flower diseasesLambe, Robert C. (Virginia Cooperative Extension Service)Woody ornamental and flower diseases control
- Guide for the control of the diseases of rhododendrons and azaleasLambe, Robert C.; Baldwin, Robert E. (Virginia Cooperative Extension Service, 1980-04)Diseases in azaleas and rhododendrons including symptoms, location of pathogen, effect of environment, and control
- Identification and control of diseases of houseplantsLambe, Robert C. (Virginia Cooperative Extension Service, 1978-06)Diseases in house plants including fungus root rots, fungus leaf spots, bacterial diseases, virus diseases, nutrient deficiency, excessively hot or dry air, insufficient light, accumulated salts, and sudden change in environment
- Identification and management of diseases of indoor plantsLambe, Robert C. (Virginia Cooperative Extension Service, 1980-08)Diseases in house plants including fungus root rots, fungus leaf spots, bacterial diseases, virus diseases, nutrient deficiency, excessively hot or dry air, insufficient light, accumulated salts, and sudden change in environment
- Identification and prevention of diseases in the home vegetable gardenLambe, Robert C. (Virginia Cooperative Extension Service, 1977-01)possible causes, symptoms and treatments to prevent disease in home gardens.
- Identification of Vegetable DiseasesLambe, Robert C. (Virginia Cooperative Extension Service, 1981-01)Discusses diseases of vegetable plants and how to diagnose the disease.
- The major diseases of boxwoodLambe, Robert C.; Wills, Wirt H. (Virginia Cooperative Extension Service, 1980-04)Boxwood diseases including phytophthora parasitica, macrophoma leaf spot, volutella stem blight, and keys to proper use of pesticides
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